Xbox Season Pass holders now have early access to the Havoc DLC Pack bonus weapons. The AE4 directed energy assault rifle and its custom weapon variant, the AE4 Widowmaker, combine a versatile firing mechanism with all-around movement speed and handling.

Learn more about the Season Pass:
http://www.callofduty.com/advancedwarfare/season-pass

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So basically its a battery gun I got an idea to make the gun so much better get a duralex battery and the ammo will pretty much never much ever run out instead o that crapy battery they had in the trailer